Oviedo-Gomez, Andres, et al. “Electricity Price Fundamentals in Hydrothermal Power Generation Markets Using Machine Learning and Quantile Regression Analysis”. International Journal of Energy Economics and Policy, vol. 11, no. 5, Aug. 2021, pp. 66-77, https://mail.econjournals.com/index.php/ijeep/article/view/11346.